When she showed me her niece's picture, I immediately saw a/the 'family resemblance'. [=a similarity in the way they look because they are related]
He bears/has a close/striking/strong/uncanny 'resemblance' to his father. [=he looks a lot like his father]
I noticed some 'resemblances' between them. [=I noticed some ways in which they resemble each other]
(..) BIFF: Your father? Before he died. Yeah. Right. So there I was, minding my own business. He says he's my distant relative. I don't see any resemblance. So I said, Sure. All I have to do is bet on the winner and I'll never lose. So I said, What's the catch? (..)1989 Back to the Future Part II